You can add page numbers to your PowerPoint slideshow through the "Slide Master" page, which lets you edit your entire slideshow at once.

How to Add a New Slide to PowerPoint. Microsoft's PowerPoint application can be an invaluable tool for creating business presentations to pitch new clients or to use as a visual aid in meetings ...

How to Remove Video and Audio Bookmarks in PowerPoint Unfortunately, PowerPoint doesn't let you reposition existing bookmarks if you realize you've put one in the wrong place on the playback timeline.